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Zina Armi Elbahri Trabelsi Souad Turki Béchir Béjaoui Naceur Ben Maïz 《Journal of Marine Science and Technology》2010,15(4):417-426
Phytoplankton community structure was investigated in a 1-year study period from January to December 2006 in the Tunis North
Lagoon (South Mediterranean). Twice a month, sampling was carried out from the whole water column. Phytoplankton species composition
showed seasonal dynamics following the general environmental variable trends in the study area, with variation in species
abundance levels within each season characterised by the presence of different phytoplankton communities. Analysis of environmental
variables indicated that phytoplankton-dominant communities were associated with various water physicochemical characteristics,
especially water temperature and salinity. Accordingly, significant correlation was recorded between water temperature and
dinoflagellates (r = 0.35; p < 0.05) in summer and diatoms (r = 0.69; p < 0.05) in autumn, whereas euglenophytes, cyanophytes and chlorophytes were slightly correlated with temperature in autumn.
Salinity was positively correlated with dichtyophytes (r = 0.41; p < 0.05) in winter and with diatoms (r = 0.65; p < 0.05) and euglenophytes (r = 0.57; p < 0.05) in autumn. On the other hand, relationships between high nitrogen nutrient concentration and phytoplankton concentration
were recorded for diatoms (r = 0.43; p < 0.05 with NO2; r = 0.49; p < 0.05 with NO3) in winter. Silicate concentration supported proliferation of diatoms (r = 0.58; p < 0.05) in autumn in our study period. In contrast, increase of dinoflagellate concentration was associated with the decrease
of these parameters in spring and summer. 相似文献
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